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- W2778049129 abstract "This thesis is focused on the key role of extracellular matrix in skin tissue engineering. Firstly, I presented three dimensional structures derived through the physiological secretion of extracellular matrix (ECM), that may be a bioinspired scaffold. I performed a biological characterization of cell-assembled ECMs from three different sub-populations of skin fibroblasts; papillary fibroblasts (Pfi), reticular fibroblasts (Rfi), and dermal papilla fibroblasts (DPfi). Fibroblast sub-populations were cultured with ascorbic acid to promote cell-assembled matrix production for 10 days. Cells were removed and the remaining matrices were characterized. I found that the ECM assembled by Pfi exhibited randomly oriented fibers, associated with highest interfibrillar space, reflecting ECM characteristics which are physiologically present within the papillary dermis. Mass spectrometry followed by immunofluorescence analysis showed that Thrombospondin is preferentially expressed within the DPfi ECM. In another experiment, keratinocytes were seeded on the top of cell depleted ECMs to generate epidermal skin constructs. I found that epidermal constructs grown on DPfi or Pfi matrices exhibited normal basement membrane formation, while Rfi matrices were unable to support membrane formation. Thus, inspiration should be taken from these different ECMs, to design therapeutic biomaterials in skin engineering applications. In the second part, I focused on human decellularized matrix for soft tissue repair and I investigated the biological interaction post-implant of this scaffold. The aims of this second part were to show the clinical results after the application of human decellularized matrix in patients suffering from abdominal hernia and to evaluate the response one year post implant, through morphological analysis of biopsy specimens. Clinical results showed that all the patients revealed a well tolerability of human decellularized matrix. Post-implant morphological results showed cellular repopulation, neo-angiogenesis, minimal inflammatory response and a well-organized collagen matrix in all biopsies. This scaffold can be considered a safe product to treat large abdominal defects." @default.
- W2778049129 created "2018-01-05" @default.
- W2778049129 creator A5023829300 @default.
- W2778049129 date "2017-05-23" @default.
- W2778049129 modified "2023-09-28" @default.
- W2778049129 title "New Frontiers of Skin Tissue Engineering: from the Laboratory to Clinical Practice" @default.
- W2778049129 doi "https://doi.org/10.6092/unibo/amsdottorato/8061" @default.
- W2778049129 hasPublicationYear "2017" @default.
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